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US7604120 -  Oct 20, 2009 
US7578390 -  Aug 25, 2009 
US7510082 -  Mar 31, 2009 
US7500564 -  Mar 10, 2009 
US20080185309 -  Aug 07, 2008 
US20080149506 -  Jun 26, 2008 
US7380668 -  Jun 03, 2008 
US7374044 -  May 20, 2008 
US20080035514 -  Feb 14, 2008